I currently live in West Virginia and have lived in Illinois and northern Idaho, and my wife is from northern Indiana. We've spent plenty of time, including winter, in Montana and South Dakota. I'm intimately familiar with the winters and the cold and how there's nothing in winter between you and the North Pole but pine trees.
If extended cold is your concern, your money is better spent -- and health preserved -- by properly insulating your house. It will by far give you the most bang for your buck in reducing your heating needs, regardless of the fuel or source. Get loose fill fiber or foam blown in the walls, and double up on the attic insulation. Get a blower door test, then fix every last draft and leaky spot you can, and the heat that is in there today will STAY there and you won't freeze even if it does go sub-zero outside.
Solar panels and batteries, including possibly an EV that can act as a big, backup battery are what I recommended to help improve your personal electricity reliability. Are you aware that a fully charged F-150 Lightning can power a typical home for multiple days? Switch to "critical loads" like heat pumps, lighting, phone charging, and light cooking, and it is a week plus. That's WITHOUT a separate home battery and ZERO solar panels generating any electricity. Cold improves the efficiency of solar panels, as long as they aren't completely buried in snow that you have to brush off.
Your focus on keeping warm is absolutely right, and I don't disagree. But it is a horrible waste of money to just burn more stuff if you're leaking all the heat outside, regardless of the fuel source.